National Instruments NI CVS-1450 Series User Manual

Page of 91
© National Instruments Corporation
4-1
4
Digital I/O Functionality
This chapter describes the primary functions of the digital inputs and 
outputs on the NI CVS-1450 device. This chapter also includes guidelines 
for connecting the digital I/O and for setting up a typical CVS-1450 device.
Overview
The digital I/O functions are accessible through 2 TTL inputs, 10 TTL 
outputs, 13 isolated inputs, and 4 isolated outputs.
You can use input signals as triggers, product selection ports, or to read 
quadrature encoders. Uses for output signals include controlling camera 
reset and exposure, controlling strobe lighting, outputting inspection 
results, or communicating with PLCs. You can also define the functions of 
digital input and output signals. 
For information about how to use the LabVIEW Real-Time Module to 
implement specific digital I/O functions, refer to the application software 
documentation and examples in the following locations:
Program
 
Files\National
 
Instruments\NI
 
1450
 
Series\Docs
<
LabVIEW
>
\examples\NI
 
1450
The NI 1450 Series Compact Vision System Digital I/O Help is available 
for each example. This help file contains digital I/O reference information 
and instructions for using the LabVIEW FPGA VIs.
Tip
To quickly launch the digital I/O help from a LabVIEW example, press <F1>.
TTL and Isolated Inputs and Outputs
This section describes the TTL and Isolated I/O functions available on the 
CVS-1450 device.